Sedgewick's tone/approach is very natural. He says things in terms of "this is what we know," sometimes implying that the subject is not as settled as it appear

Sedgewick's tone/approach is very natural. He says things in terms of "this is what we know," sometimes implying that the subject is not as settled as it appears. This in contrast to professors that just go through the motions of "this is X, this is Y, quiz on Friday."